Australian security officials are concerned over the release from jail of one of Britain's most notorious hate preachers.
The ABC has been told Australian authorities will closely monitor the release and conditions placed on Anjem Choudary, who is due to be freed in London on Friday.
The 51-year-old has served only half of a five-and-a-half-year sentence for encouraging support for the Islamic State group.
He is thought to have inspired hundreds of British jihadis, and even youths in Australia, and is widely believed to remain dangerous.
Choudary was the leader of the banned extremist group al-Muhajiroun, which motivated a number of Britons to join ISIS.